Digital Commons Network^™

The Influence Of Tropical Forests And Climate Change On The Fates Of Select Organic Pollutants In A Jamaican Watershed, Kayon Barrett

USF Tampa Graduate Theses and Dissertations

Many organic compounds, although beneficial, are associated with negative health and ecological impacts. It is therefore imperative to understand the environmental fates of these contaminants. Whereas the fates and health impacts of many persistent organic pollutants have been extensively examined, there is limited research characterizing the fates of these and the less persistent organic compounds in tropical multi-use watersheds. This study therefore aimed to evaluate the roles of forests and climate change on the environmental fates and health impacts of select organic chemicals in the Rio Cobre watershed, a tropical river basin in Jamaica. A total of 16 organic compounds …

Uncovering Transcriptional Activators And Targets Of Hsf-1 In Caenorhabditis Elegans, Jessica Brunquell

USF Tampa Graduate Theses and Dissertations

In order to survive, cells must be able to cope with a variety of environmental stressors. The heat shock response (HSR) is a pro-survival mechanism employed by cells in response to protein denaturing stress, such as heat. Since its discovery in 1960, the heat shock response has been found to be regulated by the transcription factor heat shock factor 1 (HSF1). During periods of increased stress, HSF1 undergoes a multi-step process of activation that involves homotrimerization, DNA-binding, and post-translational regulatory modifications, all of which ultimately function to control the transcription of chaperone genes. These chaperone genes encode molecular chaperone proteins …

Practical Theology In An Interpretive Community: An Ethnography Of Talk, Texts And Video In A Mediated Women's Bible Study, Nancie Hudson

USF Tampa Graduate Theses and Dissertations

This study of social interaction in a small religious group used ethnography of communication as a research method to collect and analyze data from 20 months of fieldwork. As a long-term participant-observer in a women-only interdenominational Bible study, I investigated the group’s patterned ways of speaking, how print and electronic learning materials influenced the practical application of Scripture to daily life, and how the contemporary format for women’s Bible study alters the traditional Bible study experience. Patterned ways of speaking in this setting included group discussions and conversational narratives about religion, motherhood and lack of time. Using affirmations of faith, …

Acetaminophen Associated Neurotoxicity And Its Relevance To Neurodevelopmental Disorders, Seol-Hee Kim

USF Tampa Graduate Theses and Dissertations

Autism is a lifelong neurodevelopmental disorder. The etiology of autism still remains unclear due to the heterogeneous and complex nature of the disorder, however synergistic actions between genetic components and environmental factors have been suggested. Acetaminophen (APAP) is one of the most popular over-the-counter drugs that possess antipyretic and analgesic effects. It is considered a relatively safe and effective within therapeutic doses. Recently, early exposure to APAP has been suggested to be one of the underlying cause of autism. Children are often prescribed APAP to lessen fever or irritability after vaccination during the first year, and APAP may adversely affect …

"There Is No Planet B": Frame Disputes Within The Environmental Movement Over Geoengineering, David Russell Zeller Jr.

USF Tampa Graduate Theses and Dissertations

This dissertation examines frame disputes within the environmental movement over geoengineering proposals. Among other core framing tasks, social movement organizations must evaluate solutions and strategies for the social problems they seek to address. These framings are frequently disputed by those within the movement. Recent controversies regarding a set of climate intervention proposals commonly known as geoengineering offer the opportunity to document the ongoing construction of competing visions of environmental sustainability. The nascent quality of these proposals generate dissonant framings—episodes where organizations within the environmental movement exhibit disagreement about one or more core framing tasks—a situation Goffman referred to as a …

Experimental Evaluation Of Cooling Effectiveness And Water Conservation In A Poultry House Using Flow Blurring® Atomizers, Rafael M. Rodriguez

USF Tampa Graduate Theses and Dissertations

Increases in population as well as economic improvements in developing countries are generating a larger demand for animal protein products. Current animal growth processes inherently, require the use of water in many forms throughout the growth cycle. Water is the most important natural resource on earth to sustain life, and in many developing countries is a scarce resource that must be used wisely. Studies have revealed that poultry growth can take place with less water consumption, when compared with other sources of animal protein (e.g., cattle, pork). In this research, an evaporative Flow Blurring^® cooling system was considered as …

Re-Envisioning Music Teacher Education: A Comparison Of Two Undergraduate Music Education Programs In The U.S., Jonathan Ross Kladder

USF Tampa Graduate Theses and Dissertations

The coursework requirements for an undergraduate music education degree in the U.S. have remained relatively unchanged since its inception in the early twentieth-century. In light of the changing milieu of the twenty-first century music learner, some scholars and researchers have suggested redesigning particular components of the music education degree. A few universities in the U.S. have reacted by implementing changes to their undergraduate music education curricula. Preliminary data and reviews of literature revealed that limited investigations into these programs existed. The purpose of this research was to investigate two established music education degree programs in the U.S. where the faculty …

Germania- And Silica-Based Perfluorinated And Non-Fluorinated Sol-Gel Sorbents For Capillary Microextraction In Chromatographic Analysis, Emre Seyyal

USF Tampa Graduate Theses and Dissertations

Sample preparation is the most time-consuming and error-prone step in chemical analysis. Miniaturization and automation of the sample preparation equipment eliminating or reducing the use of hazardous organic solvents, online hyphenation of sample preparation with analytical instruments in a cost-effective way are important factors that need to be considered to design and implement innovative sample preparation techniques and strategies. Solid-phase microextraction (SPME) is a simple, environmentally benign technique well suited for hyphenation with analytical instruments. However, poor coating stability is a significant drawback of SPME employing conventionally prepared coatings. This shortcoming arises from the lack of chemical bonding between the …

Interference Of Light In Multilayer Metasurfaces: Perfect Absorber And Antireflection Coating, Khagendra Prasad Bhattarai

USF Tampa Graduate Theses and Dissertations

We have studied several metamaterials structures with multiple layers by explaining them theoretically and verifying experimentally. The engineered structures we have designed work either as a perfect absorber or antireflection coating. The multilayer model as we call it Three Layer Model (TLM) has been developed, which gives the total reflection and transmission as a function of reflection and transmission of individual layers. By manipulating the amplitude and phase of the reflection and the transmission of the individual layers, we can get the required functionality of the optoelectronic devices. To get zero reflection in the both perfect absorber and the antireflection …

Humanitarian Military Intervention: A Failed Paradigm, Faruk Rahmanovic

USF Tampa Graduate Theses and Dissertations

Since the end of the Cold War, traditional justifications for war have diminished in relevance and importance, while the use of Humanitarian Military Interventions (HMI) has proliferated, to the point that formerly traditional wars – e.g. Afghanistan and Iraq invasions – have become retroactively redefined as HMIs. While HMI suffers from a number of problems, from international law to historical track record, its proponents have managed to turn aside all arguments by claiming they represent either statistical outliers, improper implementation, or at best indicate a need for a certain degree of fine-tuning. Crucially, the validity of the HMI practice is …

Controlling And Monitoring Voice Quality In Internet Communication, An Thanh Le

USF Tampa Graduate Theses and Dissertations

The Voice over Internet Protocol (VoIP) is on its way to surpassing toll quality. Although VoIP shares its transmission channel with other communication traffic, today internet has a wider bandwidth than the legacy Digital Loop Carrier and voice could be digitized higher than traditional 8 kbps, to say 16 kbps. Thus, VoIP should not be limited by the toll quality. However, VoIP quality could go down, as a result of unpredictable traffic congestion and network imperfections. These two situations cause delay jitter and packet loss of VoIP. To overcome these challenges, there are ongoing works for service providers including but …

Institutional Review Boards And Writing Studies Research: A Justice-Oriented Study, Johanna Phelps-Hillen

USF Tampa Graduate Theses and Dissertations

In this multi-method dissertation project I conduct policy analysis and utilize results from a discipline-wide survey (n=258) to examine the intersection of Writing Studies researchers’ disciplinary affiliation, research context, and personal disposition in relation to the local implementation of federal policy regarding human subjects research. I elaborate on the context of this project, discussing the September 2015 release of the Notice of Proposed Rulemaking (NPRM) to revise and update the Common Rule, 45.CFR Part 46, and the Conference on College Composition and Communication’s formal comment in response to the proposed rule’s provisions. I discuss the process of designing and implementing …

Speaking Of The Self: Theorizing The Dialogical Dimensions Of Ethical Agency, Bradley S. Warfield

USF Tampa Graduate Theses and Dissertations

This dissertation attempts to fill, in part, three lacunae in contemporary philosophical scholarship: first, the failure to identify the two distinct types of dialogism—psychological and interpersonal—that have been operative in discussions of the dialogical self; second, the lack of acknowledgement of the six most prominent features of interpersonal dialogism; and third, the unwillingness to recognize that interpersonal dialogism is a crucial feature of human ethical agency and identity.

In Chapter One, I explain why dialogism has been relatively neglected—and certainly underappreciated—in contemporary Western philosophy. In Chapter Two, I offer a picture of Mikhail Bakhtin’s conception of dialogism. I explain why …

Plasmonic Stimulation Of Electrically Excitable Cells, Fnu Parveen

USF Tampa Graduate Theses and Dissertations

There is a compelling need for the development of new sensory and neural prosthetic devices which are capable of more precise point stimulation. Current prosthetic devices suffer from the limitation of low spatial resolution due to the non-specific stimulation characteristics of electrical stimulation, i.e., the spread of electric fields generated. We present a visible light stimulation method for modulating the firing patterns of electrically-excitable cells using surface plasmon resonance phenomena. In in-vitro studies using gold (Au) nanoparticle-coated nanoelectrodes, we show that this method (substrate coated with nanoparticles) has potential for incorporating the technology into neural stimulation prosthetics, such as cochlear …

Optimization And Performance Study Of Select Heating Ventilation And Air Conditioning Technologies For Commercial Buildings, Rajeev Kamal

USF Tampa Graduate Theses and Dissertations

Buildings contribute a significant part to the electricity demand profile and peak demand for the electrical utilities. The addition of renewable energy generation adds additional variability and uncertainty to the power system. Demand side management in the buildings can help improve the demand profile for the utilities by shifting some of the demand from peak to off-peak times.

Heating, ventilation and air-conditioning contribute around 45% to the overall demand of a building. This research studies two strategies for reducing the peak as well as shifting some demand from peak to off-peak periods in commercial buildings:

1. Use of gas heat …

Exploring Teacher Assessment Literacy Through The Process Of Training Teachers To Write Assessment Items, Heather Peltier Wright

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to examine the process and impact of assessment training content and delivery mode on the quality of assessment items developed by the teachers in a two-year assessment development project. Teacher characteristics were examined as potential moderating factors. Four types of delivery mode were employed in the project: synchronous online, asynchronous online, in-person workshop, and blended (a combination of online and in-person training). The quality of assessment items developed by participating teachers was measured via: 1) item acceptance rate, 2) number of item reviews (as an indicator of how many times accepted items were rejected …

Nurses' Attitudes Toward Death: Examining The Relationship With Background And Palliative Education And Training Variables, Julie Dawn Vognsen

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to describe Registered Nurses’ attitudes toward death and their perspectives on education and training related to death and end-of-life patient care. A complementary goal was to determine whether nurses’ attitudes and perspectives are associated with background variables. The three attitudes toward death included anxiety, escape, and neutral attitudes. The background variables of the nurses included formal educational level, age, gender, ethnicity, years of nursing practice, state of residence, and area of nursing practice.

A survey including four sections was used for data collection. The first section of the survey utilized an established 32-item survey …

Tradeoffs In Protocol Designs For Collaborative Authentication, Jacob Venne

USF Tampa Graduate Theses and Dissertations

Authentication is a crucial tool used in access control mechanisms to verify a user’s identity. Collaborative Authentication (co-authentication) is a newly proposed authentication scheme designed to improve on traditional token authentication. Co-authentication works by using multiple user devices as tokens to collaborate in a challenge and authenticate a user request on single device.

This thesis adds two contributions to the co-authentication project. First, a detailed survey of applications that are suitable for adopting co-authentication is presented. Second, an analysis of tradeoffs between varying protocol designs of co-authentication is performed to determine whether, and how, any designs are superior to other …

The Dislocated Spectator's Relationship To Enchanted Objects In Early Film And Modernist Poetry, Rachel Christine Ekblad

USF Tampa Graduate Theses and Dissertations

In the early 1900s, industry and new technologies dislocated our sense of selfhood. Since the Industrial Revolution, the world had become increasingly crammed with material objects, leading up to when the invention of radio and the rise of electricity perpetuated and evidenced an interest in the immaterial. A similar fascination with magic as expressed in cultural forms such as the traveling show and the séance pointed to our new relationship to the object world: the self, dislocated from the body, could relocate in objects, forming a circuitous relationship akin to electricity. This phenomenon is encapsulated by the representation of enchanted …

Conceptualizing Social Wealth In The Digital Age: A Mixed Methods Approach, Kristina Oliva

USF Tampa Graduate Theses and Dissertations

As society continues to shift into the digital age, the relationship between social exchange and economic activity is becoming increasingly homogenous. The success of digital products are largely sustained upon the leverage of social relationships and the quasi-sharing of material items, services, and digital media. Emergence of the sharing and on-demand economies is evidence of the necessity to understand social exchange as a form of economic transaction. As such, this study attempts to conceptualize and define the concept of social wealth to understand the basis of an economic synthesis. In attempt to theoretically integrate the concept, a mixed methods design …

Essays On The Tax Policy And Insider Trading, Han Shi

USF Tampa Graduate Theses and Dissertations

In the first essay I examine the relation between firm advertising and tax aggressiveness. Advertising increases firm visibility in both the product and the financial market. While investors would appreciate more tax savings, they are aware of the negative impact of tax aggressiveness on consumers’ views of the firm and hence its competitive positions in the product market. We find that firms that spend more on advertising have fewer tax sheltering activities, lower book-tax differences, and higher cash effective tax rates. Specifically, an increase of 1% on Advertising_i,t (ADVGP_i,t), the firm pays an additional tax of $0.70 …

A Novel Approach To The Discovery Of Natural Products From Actinobacteria, Rahmy Tawfik

USF Tampa Graduate Theses and Dissertations

Actinobacteria, primarily the genus Streptomyces, have led to the development of a number of antibiotics, which result from their secondary metabolites or modified derivatives. Secondary metabolite production can result from competition with neighboring microbes in an effort to disrupt growth, aiding in the competition for vital nutrients in impoverished conditions. Such secondary metabolites have the potential to affect a plethora of cellular functions in target cells, including, cell wall development, protein synthesis, protein function and fatty acid synthesis/metabolism. Due to the pandemic spread of antibiotic resistant bacteria, it is imperative to continue the search for new therapeutic agents …

Volunteer Tourism: Fulfilling The Needs For God And Medicine In Latin America, Erin Howell

USF Tampa Graduate Theses and Dissertations

This study seeks to understand how short-term medical missions fulfill health needs for their recipients in Honduras, and how in turn, mission participants experience need fulfillment as well. By using the theoretical concept of co-construction of health to see how health needs are or are not met, I conducted a thematic analysis of the Baptist Medical and Dental Mission International (BMDMI) resulting in the following themes: 1.) Mission workers receive fulfillment from their experiences in the mission field. 2.) Mission recipients receive partial fulfillment of needs from the mission. 3). Through a calling, missions are a means to an end. …

Analysis Of Antibody-Induced Plasmodium Falciparum Sporozoites Through Scanning Electron Microscopy, Sagorika Bera

USF Tampa Graduate Theses and Dissertations

Malaria is a devastating disease that continues to affect millions of people worldwide every year. Specifically, Plasmodium falciparum is the most common human malaria parasite, particularly in sub-Saharan Africa. P. falciparum causes the most malignant and debilitating symptoms with the highest mortality and complication rates. Even with the worldwide efforts of many researchers and organizations, the road to discovering a vaccine has been difficult and challenging. Due do to the improvements in in vitro liver stage assays as well as rodent models of mammalian malaria, pre-erythrocytic stages of malaria have become a more accessible target for experimental studies. These vaccine …

Failure Analysis Of High Nickel Alloy Steel Seal Ring Used In Turbomachinery, Wenbo Wang

USF Tampa Graduate Theses and Dissertations

The system of upper high nickel alloying steel seal ring and lower high nickel alloying steel seal ring, installed in the grooves of turbine, can extend out and fit with the wall of valve cage, resulting in forming a good seal under the pressure. In the project, the failure steel seal ring is considered. This situation had threatened the safety of the whole steam turbine system. The purpose of this study is to identify the failure cause of the steel seal ring used in nuclear steam turbines. New high nickel steel alloy seal ring was compared with the failed seal …

A Study Of Corrosion Monitoring Techniques Used In Urls For Metals, Sirui Li

USF Tampa Graduate Theses and Dissertations

With the increasing use of fission-type nuclear power generation, particularly high-levels radioactive nuclear waste are generated, so the safe use of nuclear energy requires proper disposal of high-level radioactive nuclear waste. The selected treatment method is deep geological disposal. Therefore, underground research laboratory (URL) to prepare for deep geological disposal will also be carried out. Corrosion of metallic materials, which are closely related to the safety of URL, is the focus of this research project. This study selected monitoring techniques for URL and developed a rough monitoring scheme for temperature and resistivity in URL. In this study, corrosion-temperature and corrosion-resistivity …

Development Of Tools For Stable Transfection In The Human Filarial Parasite Brugia Malayi Via The Piggybac Transposon System, Johan Chabanon

USF Tampa Graduate Theses and Dissertations

Brugia malayi is one of three species of nematode known to cause lymphatic filariasis (LF) in humans. LF infects over 120 million people, causing debilitating disease. Various global programs have been launched in the past 20 years to eliminate LF. These programs have greatly scaled up the resources and efforts allocated to halting the transmission and reducing disease burden. Only a few drugs are used to treat LF, and resistance is thus a devastating possibility. Research aimed at identifying new drug targets could therefore prove essential in elimination of LF.

Genetic manipulation of B. malayi has been limited to transient …

Latino Subgroups Political Participation In American Politics: The Other Latinos’ Electoral Behavior, Angelica Maria Leon Velez

USF Tampa Graduate Theses and Dissertations

This thesis explores the impact of Latinidad in Latino political participation, especially in regard to voting behavior. Although Latinos often have been portrayed as a decisive electoral group, the reality is they have not fulfilled the expectations imposed upon them. Therefore, I argue Latinos with different levels of group consciousness will engage differently in politics, which affects the voting statistics of the ethnicity in Censuses, reports and surveys. The use of pan-ethnic terms and the constant stereotypes of Latinos all being “the same,” has caused separation rather than cohesiveness within the minority group, which has resulted in low political engagement. …

Development Of A Transfection System For The Free-Living Amoeba Naegleria Fowleri Using The Piggybac Vector, Kati Räsänen

USF Tampa Graduate Theses and Dissertations

Naegleria fowleri is a free-living amoeba that causes primary amoebic meningoencephalitis (PAM). In the United States, there are between 0-8 cases of PAM per year, with approximately 98% of cases resulting in death. High case fatality and limited treatment options highlight the need for better understanding of this organism in terms of its biology and pathogenicity. Transfection is a useful tool that allows for the study of gene function, but at present no transfection systems have been established for N. fowleri. This study attempts to establish a transfection system for N. fowleri using the piggyBac vector, with the hope of …

Simulation Studies On Ecg Vector Dipole Extraction In Liquid Medium, Pratheek Michael

USF Tampa Graduate Theses and Dissertations

To circumvent some inherent problems in the conventional ECG, this research reinvestigates an ‘unassisted’ approach which enables ECG measurement without the placement of leads on the body. Employed in this research is a widely accepted assumption that the electrical activity of the heart may be represented, largely, by a 3-D time-varying current dipole (3D-CD). From the PhysioBank database, mECG and fECG data were obtained, and Singular Value Decomposition (SVD) was performed to estimate the time-varying Vector ECG dipole. To determine the sensing matrix responsible for transforming the activity of the 3D-CD into the potential distribution on the surface of the …